Q: What is the sum of all factors of the number 2,128,120 excluding 2,128,120?

Why is 2,725,400 the sum of all factors of 2,128,120, excluding 2,128,120?

The factors of the number 2,128,120 are: 1, 2, 4, 5, 8, 10, 20, 40, 83, 166, 332, 415, 641, 664, 830, 1282, 1660, 2564, 3205, 3320, 5128, 6410, 12820, 25640, 53203, 106406, 212812, 266015, 425624, 532030, 1064060, 2128120.

If you add them up, you will get the total of 2,128,122. Now subtract 2,128,120 to get 2,725,400

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